Van Air Systems MDV400 Level Switch-Alarm - Manual (Page 4)

PAGE 4 © VAN AIR SYSTEMS INC. 2950 MECHANIC STREET, LAKE CITY, PA 16423 PRINTED IN THE USA
N o te : S ervic e w o rk to b e d o n e b y q u a lified p erso n n e l o n ly ! Alw a ys rem o v e p re s s u re a n d p o w e r fro m th e u n it b e fo re s e rv ic in g .
T R OU B L E S H OOT IN G
P R O B L E M C AU S E S S O L U T IO N
Unit will no t o p era te (P o we r
On L E D is no t lit)
No po we r C heck p ower sup ply. C heck circuit b re a ke rs o r fuse s. C he ck to see if circuit ha s a re m ote
p o we r o n/o ff switch.
F use F 1 is b lo wn Rep la ce F use F 1.
Unit will no t o p era te (P o we r
On L E D is lit)
F use F 2 is b lo wn Turn p owe r off a nd b ack o n. P re ss the P ush to Te st b utto n. If va lve d oe s not ro ta te, fuse
la b ele d F 2 o n bo tto m bo a rd is blo wn. Re p la ce fuse .
The contro l bo a rd d id
no t se nse tha t the ne xt
p o sitio n, close d o r
op e n, wa s rea che d fo r
a pe rio d o f 1 5 se cond s
If the va lve ro tate s severa l ro ta tio ns a nd the n ra nd o m ly sto p s, p re ss the P ush To Te st B utto n.
If the va lve re p ea ts the fa ult, the op tic se nso r ha s fa iled (co nsult fa cto ry). If the va lve ro tate s
b a ck to close d , the fa ult wa s corre cte d a nd the unit is running co rrectly.
F a ulty
actua to r/m o tor/valve
assem b ly
P ress the P ush To Test B utto n. If the a ctua to r m o tor turns but the va lve d oe s not, check for a
b ro ken o r lo o se valve ste m . If the ste m is b ro ken, re p la ce the va lve . If this is not the p ro ble m ,
re p lace the entire unit. If the m o to r will no t turn a fter p owe r is a p p lie d d ire ctly to it, the m oto r
ha s failed and the unit m ust be re p lace d.
Valve binds d uring ro ta tio n B all va lve se ats wo rn Rep la ce the b all va lve . B a ll va lve sho uld b e re pla ce d a t som e tim e b e twe en 1 0 0 ,00 0 a nd
1 5 0 ,00 0 cycle s (will va ry with a p plica tio n).
B all va lve b a ll clo g g e d
or da m a ge d
F re e valve of any de b ris. If valve is d a m a g e d, re p lace .
B all va lve le aks p rem a ture ly D e fe ctive b all va lve Rep la ce b a ll va lve .
Valve po sitio n is o p p o site o f
whe re it sho uld be in the
se q ue nce P ower Interrup tio n P ress the P ush to Te st b utto n. Va lve will ro ta te to the clo se d p o sitio n.
Valve op e ra te s a t o the r than
se t tim e s P ower inte rrup tio n
durring cycle
S e tting s cha nge d with
p o we r o n
Valve will continue o n se t tim e o nce p o we r is re sto re d fro m the po int p owe r wa s interrup ted .
Rem o ve p o we r a nd ad just tim e r to d e sire d setting s. S e e S E C TION 3 .0
4.0 PUSH TO TEST BUTTON
4.1
Must be pressed after timer change to initialize new setting.
4.2 If depressed and released, the valve will cycle one time.
4.3 If depressed and held, the valve will stay open until released.
5.0 REQUIRED MAINTENANCE
Periodically check the valve for the following:
5.1
Press the Push to Test button to verify valve rotation. Valve should rotate back to closed position.
5.2 Check actuator to valve connection area for debris which could impede proper operation.
5.3 Check wires and/or electrical connections for signs of damage.
5.4 Check valve for leaks. If leaks are present, remove pressure from the system and replace the ball valve.
5.5 Check fasteners for tightness.
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